diff --git a/pkgs/development/compilers/sbcl/1.2.5.nix b/pkgs/development/compilers/sbcl/1.2.5.nix
index 4ca477442a9..6c0fa874f3e 100644
--- a/pkgs/development/compilers/sbcl/1.2.5.nix
+++ b/pkgs/development/compilers/sbcl/1.2.5.nix
@@ -80,6 +80,5 @@ stdenv.mkDerivation rec {
     maintainers = [stdenv.lib.maintainers.raskin];
     platforms = stdenv.lib.platforms.all;
     inherit version;
-    updateWalker = true;
   };
 }
diff --git a/pkgs/development/compilers/sbcl/default.nix b/pkgs/development/compilers/sbcl/default.nix
index 94a17c483ab..32a73b68d5e 100644
--- a/pkgs/development/compilers/sbcl/default.nix
+++ b/pkgs/development/compilers/sbcl/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name    = "sbcl-${version}";
-  version = "1.2.8";
+  version = "1.2.9";
 
   src = fetchurl {
     url    = "mirror://sourceforge/project/sbcl/sbcl/${version}/${name}-source.tar.bz2";
-    sha256 = "0ab9lw056yf6y0rjmx3iirn5n59pmssqxf00fbmpyl6qsnpaja1d";
+    sha256 = "0pws10ylnsxj17dagqcdv0l36k3ax5k3hkc6c91n9yxh2nziagk0";
   };
 
   buildInputs = [ which ]